org.apache.hadoop.hbase.ipc.NettyRpcClientConfigHelper Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.ipc;
import com.google.common.base.Preconditions;
import io.netty.channel.Channel;
import io.netty.channel.EventLoopGroup;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.lang.StringUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
import org.apache.hadoop.hbase.util.Pair;
/**
* Helper class for passing config to {@link NettyRpcClient}.
*
* As hadoop Configuration can not pass an Object directly, we need to find a way to pass the
* EventLoopGroup to {@code AsyncRpcClient} if we want to use a single {@code EventLoopGroup} for
* the whole process.
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public class NettyRpcClientConfigHelper {
public static final String EVENT_LOOP_CONFIG = "hbase.rpc.client.event-loop.config";
private static final String CONFIG_NAME = "global-event-loop";
private static final Map>>
EVENT_LOOP_CONFIG_MAP = new HashMap<>();
/**
* Set the EventLoopGroup and channel class for {@code AsyncRpcClient}.
*/
public static void setEventLoopConfig(Configuration conf, EventLoopGroup group,
Class channelClass) {
Preconditions.checkNotNull(group, "group is null");
Preconditions.checkNotNull(channelClass, "channel class is null");
conf.set(EVENT_LOOP_CONFIG, CONFIG_NAME);
EVENT_LOOP_CONFIG_MAP.put(CONFIG_NAME,
Pair.> newPair(group, channelClass));
}
/**
* The {@code AsyncRpcClient} will create its own {@code NioEventLoopGroup}.
*/
public static void createEventLoopPerClient(Configuration conf) {
conf.set(EVENT_LOOP_CONFIG, "");
EVENT_LOOP_CONFIG_MAP.clear();
}
static Pair> getEventLoopConfig(Configuration conf) {
String name = conf.get(EVENT_LOOP_CONFIG);
if (name == null) {
return DefaultNettyEventLoopConfig.GROUP_AND_CHANNEL_CLASS;
}
if (StringUtils.isBlank(name)) {
return null;
}
return EVENT_LOOP_CONFIG_MAP.get(name);
}
}